kernel-packages team mailing list archive

[Seth Forshee <seth.forshee+lp@xxxxxxxxxxxxx>]

On Wed, Aug 13, 2014 at 01:52:54PM -0000, Dave Finnegan wrote:
> I had no issues yesterday at the office with /lib/firmware/iwlwifi-7260-7.ucode installed. 
> Was running version 8 last week and had lots of drops/reconnects.
> 
> Did not get to test on home network yet.
> Was getting drops/reconnects with both version 7, and 8 over weekend and on Monday.  
> Version 9 is available on my system, but does not load.
> Will run tests when able, and will provide wifi-debug output.

There's no "perfect" firmware version. -7 works better than -8 for some,
and -8 works better than -7 for others. -9 isn't technically supported
in 3.13 kernels (the version used for trusty) - we could potentially
backport support, but getting enough testing to confirm that it won't
cause regressions is difficult.

As a result I'm focusing on fixing the bugs people are seeing in -8. It
would be helpful if you could use that version when you're collecting
the wifi-debug data.

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https://bugs.launchpad.net/bugs/1355441

Title:
  Wifi dropping

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Environment

  Lenovo T440s
  Ubuntu 14.04
  Kernel: 3.13.0-32-generic #57-Ubuntu SMP  x86_64
  Firmware version: Aug 11 14:17:58 dave kernel: [    3.336421] iwlwifi 0000:03:00.0: loaded firmware version 22.1.7.0 op_mode iwlmvm
  # I have also tried version 22.1.8.0
  sudo lshw -C network
         description: Wireless interface
         product: Wireless 7260
         vendor: Intel Corporation
         physical id: 0
         bus info: pci@0000:03:00.0
         logical name: wlan0
         version: 83
         serial: e8:2a:ea:b3:5a:1f
         width: 64 bits
         clock: 33MHz
         capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
         configuration: broadcast=yes driver=iwlwifi driverversion=3.13.0-32-generic firmware=22.1.7.0 ip=192.168.1.121 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
         resources: irq:61 memory:f0400000-f0401fff
  sudo iwconfig:
    wlan0     IEEE 802.11abgn  ESSID:"nfu2"  
            Mode:Managed  Frequency:2.437 GHz  Access Point: 68:7F:74:A2:56:27   
            Bit Rate=54 Mb/s   Tx-Power=16 dBm   
            Retry  long limit:7   RTS thr:off   Fragment thr:off
            Encryption key:off
            Power Management:off
            Link Quality=70/70  Signal level=-22 dBm  
            Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
            Tx excessive retries:0  Invalid misc:119   Missed beacon:0
  grep wifi /var/log/syslog:
    Aug 11 14:17:58 dave kernel: [    3.336421] iwlwifi 0000:03:00.0: loaded firmware version 22.1.7.0 op_mode iwlmvm
    (30x of these:) Aug 11 16:52:15 dave kernel: [ 9256.926634] iwlwifi 0000:03:00.0 wlan0: disabling VHT as WMM/QoS is not supported by the AP

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-32-generic 3.13.0-32.57
  ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
  Uname: Linux 3.13.0-32-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  dave       1907 F.... pulseaudio
   /dev/snd/controlC0:  dave       1907 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Mon Aug 11 16:46:39 2014
  HibernationDevice: RESUME=UUID=b447ca85-41cc-44f1-b4b4-8a44bf215053
  InstallationDate: Installed on 2014-07-21 (21 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: LENOVO 20AQCTO1WW
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-32-generic.efi.signed root=UUID=a5f87e7d-a068-4cf1-94c5-0a4d068328f4 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-32-generic N/A
   linux-backports-modules-3.13.0-32-generic  N/A
   linux-firmware                             1.127.5
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/20/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GJET77WW (2.27 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20AQCTO1WW
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0E50512 STD
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrGJET77WW(2.27):bd05/20/2014:svnLENOVO:pn20AQCTO1WW:pvrThinkPadT440s:rvnLENOVO:rn20AQCTO1WW:rvrSDK0E50512STD:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 20AQCTO1WW
  dmi.product.version: ThinkPad T440s
  dmi.sys.vendor: LENOVO

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